CN110774833A - Pneumatic radial tire - Google Patents
Pneumatic radial tire Download PDFInfo
- Publication number
- CN110774833A CN110774833A CN201910669527.6A CN201910669527A CN110774833A CN 110774833 A CN110774833 A CN 110774833A CN 201910669527 A CN201910669527 A CN 201910669527A CN 110774833 A CN110774833 A CN 110774833A
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- China
- Prior art keywords
- belt
- layer
- fiber cord
- pair
- tex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000010410 layer Substances 0.000 claims abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 52
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 28
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 28
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 27
- 239000011324 bead Substances 0.000 claims abstract description 19
- 239000011247 coating layer Substances 0.000 claims abstract description 19
- 238000005452 bending Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 11
- 230000003014 reinforcing effect Effects 0.000 description 10
- 238000000576 coating method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000183024 Populus tremula Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C2009/1828—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers characterised by special physical properties of the belt ply
Abstract
The invention provides a pneumatic radial tire capable of effectively reducing road noise while maintaining good durability. The pneumatic radial tire comprises a tread portion, a pair of side portions, and a pair of bead portions, wherein a carcass layer is provided between the pair of bead portions, a plurality of belt layers are arranged on the outer peripheral side of the carcass layer in the tread portion, and a belt coating layer comprising a plurality of organic fiber cords wound spirally in the tire circumferential direction is arranged on the outer peripheral side of the belt layer, wherein the belt coating layer is composed of a full coating layer covering the entire area of the belt layer and a pair of edge coating layers partially covering both ends of the belt layer, and the polyethylene terephthalate fiber cord having an elastic modulus in a 44N load at 100 ℃ in a range of 3.5 cN/(tex% -5.5 cN/(tex%) and a thermal shrinkage stress at 100 ℃ of 0.6cN/tex or more is used in the belt coating layer.
Description
Technical Field
The present invention relates to a pneumatic radial tire using a polyethylene terephthalate (PET) fiber cord as a belt coating layer, and more particularly, to a pneumatic radial tire capable of effectively reducing road noise (roadnoise) while maintaining excellent durability.
Background
In a pneumatic radial tire for a passenger vehicle or a small truck, a carcass layer is provided between a pair of bead portions, a plurality of belt layers are disposed on the outer circumferential side of the carcass layer in a tread portion, and a belt coating layer including a plurality of organic fiber cords wound spirally in the tire circumferential direction is disposed on the outer circumferential side of the belt layers. Such a belt coating contributes to improvement in high-speed durability, and also contributes to reduction in mid-frequency road noise.
Conventionally, nylon fiber cords have been the mainstream of organic fiber cords used for belt coatings, but it has been proposed to use polyethylene terephthalate fiber cords having higher elasticity and lower cost than nylon fiber cords (see, for example, patent document 1).
However, if the elastic modulus of the polyethylene terephthalate fiber cord is too high, there is a problem as follows: the fatigue resistance of the cord is lowered, and the durability of the tire is deteriorated. On the other hand, if the elastic modulus of the polyethylene terephthalate fiber cord is too low, the effect of reducing road noise cannot be sufficiently obtained.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2001-63312
Disclosure of Invention
Problems to be solved by the invention
The present invention aims to provide a pneumatic radial tire capable of effectively reducing road noise while maintaining good durability.
Means for solving the problems
The pneumatic radial tire of the present invention for achieving the above object includes a tread portion extending in a tire circumferential direction and having a ring shape, a pair of side portions arranged on both sides of the tread portion, and a pair of bead portions arranged on an inner side of the side portions in a tire radial direction, wherein a carcass layer is provided between the pair of bead portions, a plurality of belt layers are arranged on an outer circumferential side of the carcass layer at the tread portion, a belt covering layer including a plurality of organic fiber cords wound in a spiral shape along a tire circumferential direction is arranged on an outer circumferential side of the belt layer,
the pneumatic radial tire is characterized in that,
the belt layer is composed of a full coating layer covering the whole area of the belt layer and a pair of edge coating layers respectively and partially covering the two ends of the belt layer, and the organic fiber cord is composed of a polyethylene terephthalate fiber cord, the elastic modulus of the organic fiber cord under the load of 44N at 100 ℃ is in the range of 3.5cN/(tex DEG-) -5.5 cN/(tex-), and the thermal shrinkage stress at 100 ℃ is more than 0.6 cN/tex.
ADVANTAGEOUS EFFECTS OF INVENTION
As a result of intensive studies on a pneumatic radial tire having a belt coating layer made of a polyethylene terephthalate fiber cord, the present inventors have found that: the present inventors have completed the present invention by optimizing the dipping (dip) treatment of a polyethylene terephthalate fiber cord and setting the elastic modulus under a load of 44N at 100 ℃ and the thermal shrinkage stress at 100 ℃ to predetermined ranges to obtain fatigue resistance and a hoop effect (タガ effect, japanese) suitable for a cord as a belt coating layer.
That is, in the present invention, in a structure in which the belt cover is composed of a full cover covering the entire belt layer and a pair of edge covers partially covering both end portions of the belt layer, the road noise can be effectively reduced while maintaining the durability of the pneumatic radial tire satisfactorily by using, as the organic fiber cord constituting the belt cover, a polyethylene terephthalate fiber cord having an elastic modulus at 100 ℃ under a load of 44N in the range of 3.5 cN/(tex%) to 5.5 cN/(tex%) and a thermal shrinkage stress at 100 ℃ of 0.6cN/tex or more.
In the present invention, it is preferable that the twist factor (japanese: り) K of the organic fiber cord represented by the following formula (1) be in the range of 1300 to 1800. This makes it possible to achieve both the durability improvement effect and the road noise reduction effect with a higher degree of dimension.
Wherein, T: number of twists (Japanese: number of upper り) (times/10 cm) of organic fiber cord
D: total fineness (dtex) of organic fiber cord
The polyethylene terephthalate fiber cord preferably has a Gurley bending hardness (Japanese: ガーレー aspen さ) of 20mN or less. This improves the fatigue resistance of the cord, and effectively improves the durability of the tire.
In the present invention, a tensile test was performed under the conditions of a nip interval of 250mm and a tensile speed of 300 ± 20 mm/min in accordance with JIS-L1017 "method タイヤコード test (chemical fiber tire cord test method)", and the elastic modulus [ N/(tex ·%) ] under a load of 44N at 100 ℃ was calculated by converting the slope of the tangent line at the point corresponding to the load of 44N in the load-elongation curve into a value per 1 tex. The thermal shrinkage stress (cN/tex) at 100 ℃ was measured as the thermal shrinkage stress of the sample cord when heated under conditions of a sample length of 500mm and a heating condition of 100 ℃ for 5 minutes in accordance with JIS-L1017 "method for maintaining タイヤコード test test" under chemical . The Gurley bending hardness (mN) is a stiffness (Japanese: degrees) measured in accordance with JIS-L1096.
The specific measurement method of the gurley bending hardness is as follows. First, 2 test pieces having a length of Lmm were extracted from the belt covering cord to be measured. Then, a test piece was attached to the chuck (chuck) using a grignard tester (for example, a grignard fabric stiffness tester (japanese: ガーレー ス テ フ ネ ス テ ス タ) manufactured by toyobo seiko corporation), the chuck was fixed in accordance with any of the scales 1, 1.5, and 2(L/25.4) on the movable arm, and the test piece was moved to a position separated from the apex of the pendulum (japanese: vibration り). Then, the weights (Japanese: おもり) Wa (g), Wb (g), and wc (g) are attached to the load attachment holes a, b, and c from the pivot of the pendulum toward the lower portion, individually or in combination, so as to be in a vertical state without vibration. Here, the movable arm is moved at a fixed speed to the right or left at a speed of 2 times/min. The scale RG when the lower part of the test piece is in contact with the pendulum and separated from the pendulum is read. The surface and the back of 2 test pieces were measured for stiffness, respectively. The average value of 5 times was calculated, and the stiffness Br was determined by the following equation. The calculated value of the stiffness Br is rounded to 1 position after the decimal point.
[ EQUATION 1 ]
Here, Br: stiffness (mN)
RG: graduation of test strip when it leaves from pendulum
a. b, c: distance (mm) between load mounting hole and fulcrum
Wa (g), Wb (g), Wc: mass (g) of weight mounted to load mounting hole
L: length of test piece (mm)
d: width of test piece (i.e., cord diameter. times.2) (mm)
Drawings
Fig. 1 is a meridian cross-sectional view showing a pneumatic radial tire constituted by an embodiment of the present invention.
Fig. 2 is a plan view of the pneumatic radial tire of fig. 1 with a belt layer and a belt cover layer extracted.
Description of the reference numerals
1: a tread portion;
2: a sidewall portion;
3: a bead portion;
4: a carcass layer;
5: a bead core;
6: a bead filler;
7: a belt ply;
8: a belt ply;
8A: fully coating;
8B: an edge coating;
10: a main groove.
Detailed Description
Hereinafter, the configuration of the present invention will be described in detail with reference to the drawings. Fig. 1 is a diagram showing a pneumatic radial tire constituted by an embodiment of the present invention, and fig. 2 is a diagram showing a belt layer and a belt cover thereof.
As shown in fig. 1, the pneumatic radial tire of the present embodiment includes a tread portion 1 extending in a tire circumferential direction and having a ring shape, a pair of sidewall portions 2 disposed on both sides of the tread portion 1, and a pair of bead portions 3 disposed on the inner side of the sidewall portions 2 in the tire radial direction. A plurality of main grooves 10 extending in the tire circumferential direction are formed in the tread portion 1, but various grooves including a lateral groove (japanese patent No. ラグ channel) extending in the tire width direction may be formed in addition to the main grooves 10.
A carcass layer 4 including a plurality of reinforcing cords extending in the tire radial direction is provided between the pair of bead portions 3, 3. An annular bead core 5 is embedded in each bead portion 3, and a bead filler 6 made of a rubber composition having a triangular cross section is disposed on the outer periphery of the bead core 5. The carcass layer 4 is wound around the bead core 5 from the inner side to the outer side of the tire. As the reinforcing cord of the carcass layer 4, for example, a polyester cord is preferably used.
On the other hand, a plurality of belt layers 7 are embedded over the entire circumference of the tire on the outer circumferential side of the carcass layer 4 in the tread portion 1. These belt layers 7 include a plurality of reinforcing cords inclined with respect to the tire circumferential direction, and are disposed between the layers so that the reinforcing cords intersect with each other. In the belt layer 7, the inclination angle of the reinforcing cords with respect to the tire circumferential direction is set in the range of, for example, 10 ° to 40 °. As the reinforcing cords of the belt layer 7, for example, steel cords are preferably used.
For the purpose of improving high-speed durability and reducing road noise, as shown in fig. 2, a belt coating layer 8 in which reinforcing cords are arranged at an angle of 5 ° or less with respect to the tire circumferential direction is disposed on the outer circumferential side of the belt layer 7. The belt cover 8 is constituted by a full cover 8A covering the entire area of the belt layer 7 and a pair of edge covers 8B partially covering both edge portions of the belt layer 7. The belt coating layer 8 is preferably formed in a seamless (jointless) structure in which a rubber-covered belt formed by aligning at least 1 reinforcing cord is wound in a spiral shape in the tire circumferential direction. As the reinforcing cord of the belt cover 8, an organic fiber cord is used.
In the pneumatic radial tire, as the organic fiber cord constituting the belt cover layer 8, a polyethylene terephthalate fiber cord having an elastic modulus at a load of 44N at 100 ℃ in a range of 3.5cN/(tex ·%) to 5.5cN/(tex ·%) and a heat shrinkage stress at 100 ℃ of 0.6cN/tex or more is used.
In the pneumatic tire described above, by adopting a structure in which the belt cover 8 is composed of the full cover 8A covering the entire area of the belt layer 7 and the pair of edge covers 8B partially covering both end portions of the belt layer 7, and using, as the organic fiber cord constituting the belt cover 8, a polyethylene terephthalate fiber cord having an elastic modulus at 100 ℃ under a 44N load in a range of 3.5 cN/(tex%to 5.5cN/(tex ·%) and a thermal shrinkage stress at 100 ℃ of 0.6cN/tex or more, it is possible to effectively reduce road noise while maintaining the durability of the pneumatic tire well.
Here, if the elastic modulus of the polyethylene terephthalate fiber cord under a load of 44N at 100 ℃ is less than 3.5cN/(tex ·%), the mid-frequency road noise cannot be sufficiently reduced, and conversely, if it exceeds 5.5cN/(tex ·%), the fatigue resistance of the cord is reduced, and the durability of the tire is reduced. Further, if the heat shrinkage stress at 100 ℃ of the polyethylene terephthalate fiber cord is less than 0.6cN/tex, the hoop effect during running becomes small, and high-speed durability cannot be sufficiently maintained. The upper limit of the thermal shrinkage stress is preferably 2.0 cN/tex.
In order to obtain a polyethylene terephthalate fiber cord having the above-described physical properties, it is preferable to appropriately perform, for example, a dipping treatment. That is, it is preferable that the polyethylene terephthalate fiber cord is dipped with an adhesive before the rolling step, but in the standardization (normalization) step after the 2-bath treatment, the environmental temperature (japanese: temperature gradient) is set in the range of 210 ℃ to 250 ℃ and the cord tension is set in the range of 2.2 × 10
-2N/tex～6.7×10
-2Range of N/tex. This can impart desired physical properties to the polyethylene terephthalate fiber cord as described above. If the cord tension in the normalization process is less than 2.2X 10
-2N/tex, the cord elastic modulus becomes low and the mid-frequency road noise cannot be sufficiently reduced, whereas if it exceeds 6.7X 10
-2N/tex, the cord elastic modulus increases, and the fatigue resistance of the cord decreases.
In the pneumatic tire, the twist factor K of the organic fiber cord represented by the following formula (1) is preferably in the range of 1300 to 1800. This makes it possible to achieve both the durability improvement effect and the road noise reduction effect with a higher degree of dimension.
Wherein, T: number of upper twists (times/10 cm) of organic fiber cord
D: total fineness (dtex) of organic fiber cord
Here, if the twist coefficient K of the organic fiber cord constituting the belt cover layer 8 is less than 1300, the fatigue resistance of the cord is lowered and the durability of the tire is lowered, and conversely, if it exceeds 1800, the cord modulus (modulus) is lowered and the mid-frequency road noise cannot be effectively reduced. Preferably, the total fineness of the organic fiber cord constituting the belt coating layer 8 is in the range of 1000dtex to 3000dtex, and the number of twists thereon is in the range of 20.0 times/10 cm to 40.0 times/10 cm.
The polyethylene terephthalate fiber cord used for the belt cover 8 preferably has a gurley bending hardness of 20mN or less. The cord having such gurley bending hardness is excellent in fatigue resistance, and therefore, the durability of the tire can be effectively improved. If the gurley bending hardness of the polyethylene terephthalate fiber cord is more than 20mN, the fatigue resistance of the cord is lowered, and the effect of improving the durability of the tire is lowered. The lower limit of the gurley bending hardness of the polyethylene terephthalate fiber cord is about 4 mN.
[ examples ] A method for producing a compound
A tire having a tire size of 225/60R18, comprising a tread portion, a pair of sidewall portions and a pair of bead portions, a carcass layer is provided between a pair of bead portions, 2 belt layers are disposed on the outer circumferential side of the carcass layer at the tread portion, in a pneumatic tire in which a belt cover layer (full cover or edge cover) containing a polyethylene terephthalate fiber cord as a reinforcing cord is disposed on the outer peripheral side of a belt layer, the tire of the prior art 1, the comparative examples 1 to 3 and the examples 1 to 7 in which the cord structure of the polyethylene terephthalate fiber cord used for the belt coating layer, the cord tension in the standardized step after the 2-bath treatment, the elastic modulus under the load of 44N at 100 ℃, the thermal shrinkage stress at 100 ℃, the gurley bending hardness, the number of twists and the twist factor are set as shown in table 1 and table 2.
The belt cover layer has a seamless structure obtained by spirally winding a belt in the tire circumferential direction, the belt being formed by aligning a plurality of polyethylene terephthalate fiber cords and covering the cords with rubber. The cord embedding density in the tape was 50 strips/50 mm.
The test tires were evaluated for road noise and durability by the following evaluation methods, and the results are shown in tables 1 and 2.
Road noise:
each test tire was assembled to a wheel having a rim size of 18 × 7J and mounted as front and rear wheels of a passenger vehicle having an exhaust gas volume of 2500cc, the air pressure was set to 230kPa, a sound collecting microphone was provided inside a window of a driver's seat, and a sound pressure level in the vicinity of a frequency of 315Hz when the vehicle was driven on a test road made of an asphalt road surface under a condition that the average speed was 50km/h was measured. As the evaluation result, the amount of change (dB) from the reference is shown based on the conventional example.
Durability:
each test tire was assembled to a wheel having a rim size of 17X 7J, stored in a chamber kept at 60 ℃ for 2 weeks with oxygen sealed at an internal pressure of 230kPa, then the oxygen inside was released, and air was filled at an internal pressure of 160 kPa. The test tire pretreated in this way was mounted on a roller testing machine equipped with a roller having a smooth surface and a diameter of 1707mm, and the running distance until the tire failed was measured while the load and the slip angle were varied with a rectangular wave of 0.083Hz under the conditions of controlling the peripheral temperature at 38 ± 3 ℃ and the running speed at 50km/h, the slip angle (slip) at 0 ° ± 3 ° and the load at 70% ± 40% of the maximum load specified in JATMA. The evaluation results were expressed by an index in which the conventional example was set to 100, using the measured values of the travel distances. The larger the index value, the more excellent the durability.
[ TABLE 1 ]
[ TABLE 2 ]
As is clear from tables 1 and 2, the tires of examples 1 to 7 can effectively reduce road noise while maintaining good durability in comparison with conventional example 1 serving as a reference. On the other hand, in each of the tires of comparative examples 1 to 2, the elastic modulus at a load of 44N at 100 ℃ of the polyethylene terephthalate fiber cord constituting the belt coating layer was too high, and the durability of the tire was lowered. In addition, the tire of comparative example 3 has an insufficient effect of improving road noise because the modulus of elasticity at 100 ℃ under a load of 44N of the polyethylene terephthalate fiber cord constituting the belt coating layer is too low.
Claims (3)
1. A pneumatic radial tire comprising a tread portion extending in a tire circumferential direction and having a ring shape, a pair of side portions arranged on both sides of the tread portion, and a pair of bead portions arranged on the inner side of the side portions in the tire radial direction, wherein a carcass layer is provided between the pair of bead portions, a plurality of belt layers are arranged on the outer circumferential side of the carcass layer at the tread portion, a belt layer comprising a plurality of organic fiber cords wound in a spiral shape along the tire circumferential direction is arranged on the outer circumferential side of the belt layer,
the pneumatic radial tire is characterized in that,
the belt layer is composed of a full coating layer covering the whole area of the belt layer and a pair of edge coating layers respectively and partially covering the two ends of the belt layer, and the organic fiber cord is composed of a polyethylene terephthalate fiber cord, the elastic modulus of the organic fiber cord under the load of 44N at 100 ℃ is in the range of 3.5cN/(tex DEG-) -5.5 cN/(tex-), and the thermal shrinkage stress at 100 ℃ is more than 0.6 cN/tex.
2. The pneumatic radial tire according to claim 1,
the organic fiber cord represented by the following formula (1) has a twist factor K in the range of 1300 to 1800,
wherein, T: number of upper twists (times/10 cm) of organic fiber cord
D: total fineness (dtex) of the organic fiber cord.
3. Pneumatic radial tire according to claim 1 or 2,
the polyethylene terephthalate fiber cord has a Gurley bending hardness of 20mN or less.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-138615 | 2018-07-24 | ||
| JP2018138615A JP7139752B2 (en) | 2018-07-24 | 2018-07-24 | pneumatic radial tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110774833A true CN110774833A (en) | 2020-02-11 |
| CN110774833B CN110774833B (en) | 2023-03-03 |
Family
ID=69384098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910669527.6A Active CN110774833B (en) | 2018-07-24 | 2019-07-24 | Pneumatic radial tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7139752B2 (en) |
| CN (1) | CN110774833B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115362071A (en) * | 2020-04-07 | 2022-11-18 | 横滨橡胶株式会社 | Pneumatic tire |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7103318B2 (en) * | 2019-08-08 | 2022-07-20 | 横浜ゴム株式会社 | Pneumatic tires |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54101956A (en) * | 1978-01-19 | 1979-08-10 | Teijin Ltd | Production of reinforcing material for rubber structure |
| JP2000212875A (en) * | 1999-01-18 | 2000-08-02 | Toyobo Co Ltd | Polyester fiber material having improved adhesion to rubber and its production |
| JP2006159984A (en) * | 2004-12-03 | 2006-06-22 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| CN101107138A (en) * | 2005-01-21 | 2008-01-16 | 株式会社普利司通 | Pneumatic radial tire |
| CN101516649A (en) * | 2006-09-22 | 2009-08-26 | 横滨橡胶株式会社 | Pneumatic radial tire |
| JP2009203594A (en) * | 2008-01-30 | 2009-09-10 | Toray Ind Inc | Polyester fiber cord for reinforcing rubber |
-
2018
- 2018-07-24 JP JP2018138615A patent/JP7139752B2/en active Active
-
2019
- 2019-07-24 CN CN201910669527.6A patent/CN110774833B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54101956A (en) * | 1978-01-19 | 1979-08-10 | Teijin Ltd | Production of reinforcing material for rubber structure |
| JP2000212875A (en) * | 1999-01-18 | 2000-08-02 | Toyobo Co Ltd | Polyester fiber material having improved adhesion to rubber and its production |
| JP2006159984A (en) * | 2004-12-03 | 2006-06-22 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| CN101107138A (en) * | 2005-01-21 | 2008-01-16 | 株式会社普利司通 | Pneumatic radial tire |
| CN101516649A (en) * | 2006-09-22 | 2009-08-26 | 横滨橡胶株式会社 | Pneumatic radial tire |
| JP2009203594A (en) * | 2008-01-30 | 2009-09-10 | Toray Ind Inc | Polyester fiber cord for reinforcing rubber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115362071A (en) * | 2020-04-07 | 2022-11-18 | 横滨橡胶株式会社 | Pneumatic tire |
| CN115362071B (en) * | 2020-04-07 | 2023-05-12 | 横滨橡胶株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020015381A (en) | 2020-01-30 |
| JP7139752B2 (en) | 2022-09-21 |
| CN110774833B (en) | 2023-03-03 |
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